Changbai Mountain, true to its name, is incredibly clean! The restrooms in all areas were spotless, with sensor-activated flushes and hot water for handwashing – a truly touching experience for an autumn/winter trip. The restrooms had different themes, such as sables and black bears, adding a touch of vibrancy. We arrived a little late; most of the leaves had fallen, and it was the dry season, so the waterfalls weren't at their most beautiful. The small Tianchi Lake wasn't worth visiting yet; it's small, the water quality is so-so, and the surrounding forests are bare. Overall, the autumn air was crisp and clear. The 50-kilometer stretch from the distribution center to the transfer center was beautiful, vibrant with color, and Tianchi Lake was stunning. I especially loved the forest at the bottom of the valley; the pine scent was wonderful! I highly recommend walking to the end; there are vast, fairytale-like forests there, and we were lucky enough to encounter foxes and quite a few chipmunks along the way!